move TimeStampedModel docs to models.rst
Merge pull request #98 from BME-IK/move-timestamp-docs

Move TimeStampedModel docs to models.rst
fix get_query_set deprecationwarnings
backwards comptatible get_queryset, for Django < 1.6
Check for StatusModel field name conflicts correctly.
Update runtests.py for compatibility with Django 1.7.
Update tox.ini.
Merge branch 'master' into query-set-deprecated

* master:
  Update tox.ini.
  Update runtests.py for compatibility with Django 1.7.
  Check for StatusModel field name conflicts correctly.
Remove special support for pickling PassThroughManager; apparently unnecessary in all supported Django/Python versions.
Bump version to 2.0.
Update supported Django/Python versions.
Bump version for dev.
Attempt to carry over extras(select) values from parent
added geo support for PassThroughManager
edited class names
edited class names
edited doc string
removed GeoDjango specific code. Abstracted all managers
Update tests.py
moved get_query_set = get_queryset from the mixin to the manager